ASEAN Journal of Scientific and Technological Reports最新文献

{"title":"Effect of Decomposed-Stone Dust on Properties of Concrete","authors":"Chookiat Choosakul, Khwanchiwa Yongsata, Sunun Monkaew","doi":"10.55164/ajstr.v25i1.244118","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244118","url":null,"abstract":"TThe objective focused on the study of shrinkage behavior of concrete using Decomposed-Stone Dust to replace Portland cement type 1 in the ratio of 10, 15 , and 20 percent by weight of binder as well as designing compressive strength at 280 kg/cm2. Testing the formation time,  shrinkage behavior, and compressive strength of concrete was compared with the concrete using Portland cement type 1. The study found that the concrete using Decomposed-Stone Dust  was an increased formation period in accordance with the amount of replaced Decomposed-Stone Dust. Autogenous shrinkage, dry shrinkage, and compressive strength of concrete mixed with Decomposed-Stone Dust were less than control concrete. In all mixing ratios, the ratio of 20% replacement of Portland cement dust was the most suitable for this study. The initial formation time was 155 minutes. The final formation period was 305 minutes. The autogenous shrinkage was 312 microns, the dry shrinkage was 699 microns and compressive strength was 286 kg/cm2 respectively at age 28 days.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In silico screening of potential inhibitor from Andrographis paniculata constituents against three targets of SARS-CoV-2: Main protease, Spike protein, and Nsp15","authors":"Panita Kongsune, Wansiri Innok, T. Rungrotmongkol","doi":"10.55164/ajstr.v25i1.245942","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.245942","url":null,"abstract":"The current pandemic of COVID-19 is caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), which has increased the morbidity and mortality rate throughout the world. World Health Organization has declared this COVID-19 outbreak as a health emergency throughout the world. At this time, there are very few drugs against SARS-CoV-2. So, this study aimed to screen 91 Andrographis paniculata against three targets of SARS-CoV-2: main protease, spike protein, and Nsp15 by molecular docking. The calculation result revealed that mostly bioactive compounds from Andrographis paniculata are a good binding affinity with the main   protease than that of Nsp15 and spike protein. The top six compounds and their interactions with the active site were visualized. Among them, 7,8-dimethoxy flavone-5-b-D-glucopyranosyloxy flavone and Stigmasterol compounds from Andrographis paniculata had a superior binding affinity of -11.65 and -11.33 kcal/mol toward the main protease. A detailed understanding of ligand-protein interaction could be helpful in further drug design and development for COVID-19 treatment.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128265071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 decomposition using the coaxial dielectric barrier discharge: effect of additive gas and double outer electrodes","authors":"Nikom Rattanarojanakul, Somyos Srikhongrak, Witoon Nulek, Y. Tirawanichakul","doi":"10.55164/ajstr.v25i1.244790","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244790","url":null,"abstract":"This work has studied CO2 decomposition through the dielectric barrier discharge (DBD). The configuration of the DBD reactor was performed as a coaxial DBD tube. The dielectric barrier was made of a quartz tube with 1 mm thickness, while an outer electrode was made of a copper flat sheet wrapping around a quartz tube. The coaxial axis was made of stainless steel rod to be an inner electrode. The power source was applied by the alternative current (AC) high voltage with 7.8 kHz of frequency to both electrodes of the plasma reactor. The experiment was conducted on various conditions such as a mixed gas ratio, discharge gap, applied voltage, outer electrode length, two outer electrodes, and gas flow rate. The results showed that CO2 conversion was decreased when CO2 concentration increased. Similarly, the increase of gas flow rate also caused the decrease of CO2 conversion. Whilst the increase of an applied voltage causes the CO2 conversion clearly increased. Similarly, the CO2:Ar ratio of 60%:40% achieved 30% of CO2 conversion. Furthermore, the high percentage of CO2 conversion of 47.2% has been obtained from a 1.3 mm discharge gap with 40 ml/min of gas flow rate.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125801586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Development of Saline Infusion Administration System Using IoT","authors":"Nuth Otanasap, Veerapong Kanchanawongkul, Chanintorn Chalermsuk","doi":"10.55164/ajstr.v25i1.244460","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244460","url":null,"abstract":"According to the current deficiency of medical personnel due to many COVID-19 patients today, the workload of nurses and caregivers increases. One of the costliest tasks for healthcare professionals is monitoring and controlling the administration of saline solutions to bedridden patients. This research aims to develop a monitoring and regulating system to conduct the saline solution to patients using IoT technology. The Arduino UNO R3 and Node MCU ESP8266 microcontroller board are used as a processor to receive the saline weight input from the load cell and control the saline flow rate by the servo motor arm. The developed system can also be remotely monitored and controlled online via Wi-Fi, Internet, and cloud computing with mobile and web applications developed by Flutter. From the results of trying that determine the saline flow rate with different periods, it was found that the system was able to control the flow rate for the specified time with a total meantime accuracy of 88.47%. It was also found that the accuracy rate would increase if the flow rate were set for a short period, while the accuracy rate would decrease if the flow rate were set for a long time. The experiment revealed that the developed prototype system could monitor, alert, and automatically control the flow rate of saline administration to patients as the specified objectives.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121801192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production Line Process Improvement with Process Reengineering – A Case Study In Garment Factory","authors":"Yanin Palasri, Somjai Boonsiri","doi":"10.55164/ajstr.v25i1.244708","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244708","url":null,"abstract":"ABC is struggling to reach daily production objectives and has low productivity, which is one of the productline line process problem. Business Process Reengineering (BPR) employs process redesign heuristics to enhance an existing production line process using an assessment technique and fit-gap analysis. The simulation tool is used to model the production line process redesign. After adopting the provided approach and conducting the simulation, the company's production productivity and service level increased by about 45%. The required simulation resulted in critical measurements such as manufacturing capacity and lead-time. This research demonstrates the redesign production line process that must be followed to archive this artefact.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133977006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy of Oral Toltrazuril in Newborn Piglet","authors":"Supaporn Somrup, Pitchayapa Saracharoen","doi":"10.55164/ajstr.v25i1.244250","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244250","url":null,"abstract":"Drug in piglets has a protective effect against dysentery. The aims of this study were determined the efficacy of toltrazuril in newborn-piglets. In 2 piglets of 819 piglets were divided into 2 groups. Baycox® drug group, using 446 piglets. Zurilguard® drug by using 373 piglets by adding a dose of toltrazuril antibiotic 1 ml. by oral suspension. It was found that the weaned weight of the Baycox® and Zurilguard® was found no significant difference (P > 0.05). The percentage of farrowing crate damage for the Baycox® of drugs had 10.23 % (39/407). In Zurilguard®, there was a percentage of farrowing crate damage at 3.18 % (14/359). As a result, percentages of farrowing crate damage were significantly different in both groups (P < 0.05). Efficacy from FCS indicated that Baycox® was more effective at returning piglets to diarrhea FCS 3 in newborn-piglets 39.24% (175/446) pigs at 7 day 43.64% (182/417) pigs at 14 day 24.27 % (100/412) weaned 25.80% (105/407). FCS indicated that Zurilguard® was more effective at returning piglets to FCS-3. In newborn-piglets 33.51% (125/373) piglets 7 days 37.82% (138/366) at piglets 14 days 58.96 % (214/363) weaned 42.82% (153/359). Zurilguard® had a lower rate of returning of FCS-3 in newborn-piglets and pig at 7 day than the Baycox® but rate of return of FCS-3 in pig at 14 day and weaned pigs more than Baycox®. In conclusion of oral toltrazuril that found efficacy of Zurilguard® for mortality rate of newborn-piglets to weaning in 21 days more than Baycox®. ","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"2011 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121458860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences of Precipitation Characteristics among GCMs over Southeast Asia under AR6 Climate Change Scenarios","authors":"Ketvara Sittichok, C. Thepprasit","doi":"10.55164/ajstr.v25i1.244632","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.244632","url":null,"abstract":"Southeast Asia is known globally as a highly vulnerable climate change region. Precipitation is the primary factor that impacts livelihood in this region due to recurring flood and drought incidents. Variables projections under climate change can be made using General Circulation Models (GCMs). An investigation of projected precipitation with the new phase of the model experiment, the Sixth Assessment Report (AR6), is worth to be considered. This study investigates the spatial distributions of variability, trend and conditions (wet/dry) of precipitations generated using 10 GCMs over the SEA under AR6 with four scenarios (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8). Three statistical methods, coefficient of variation (CV), Mann-Kendall test (MK) and standardized anomaly index (SAI), were calculated by grid cells. Significant differences among GCMs could be seen in the results. High precipitation variation with CV was indicated around the southern part of Indonesia and the Philippines oceans for six models, whereas only one model (MRI-ESM2) returned strong variation for mainland countries. A decreasing precipitation trend during the historical period could be observed in mainland countries with four GCMs. However, the SSP3-7.0 and SSP5-8.5 of most models presented precipitation increment. The extremely wet and dry ratio to all other years was calculated. Highly wet years higher than 10% were indicated in SSP5-8.5 with MPI-ESM1 occurring in most areas of the region, whereas other models gave 6-10% of highly wet occurrence. Drought situation occurred higher than 10% and could be seen with only three models with small areas under all scenarios.  returned strong variation for mainland countries. A decreasing precipitation trend during the historical period could be observed in mainland countries with four GCMs. However, the SSP3-7.0 and SSP5-8.5 of most models presented precipitation increment. The extremely wet and dry ratio to all other years was calculated. Highly wet years higher than 10% were indicated in SSP5-8.5 withMPI-ESM1 occurring in most areas of the region, whereas other models gave 6-10% of highly wet occurrence. Drought situation occurred higher than 10% and could be seen with only three models with small areas under all scenarios.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132238091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"N,N-Dimethylbenzimidazolium iodide as an Efficient Catalyst for a Green Reaction of Intermolecular Stetter Reaction in Water","authors":"Dr.Baramee Phungpis","doi":"10.55164/ajstr.v25i1.245292","DOIUrl":"https://doi.org/10.55164/ajstr.v25i1.245292","url":null,"abstract":"             N,N-dimethylbenzimidazolium iodide in the presence of NaOH catalyst intermolecular Stetter reaction in water was developed to afford the desired 1,4-addition products in satisfactory to good yields, although aroin products occurred competitively. The benzimidazolium salt catalyst and NaOH mixture can be reused several times without significant loss of efficiency.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120980768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk of Climate Variability on Tilapia Cage Culture in Songkhram River in Northeastern Thailand","authors":"Supannee Suwanpakdee, P. Sriyasak, Pornpimol Pimolrat","doi":"10.55164/ajstr.v24i3.243848","DOIUrl":"https://doi.org/10.55164/ajstr.v24i3.243848","url":null,"abstract":"The cage culture of Nile Tilapia in the river is one of the most important methods for Nile Tilapia (Oreochromis niloticus) farming in Thailand. Songkhram river is a significant river in north-eastern Thailand where Nile Tilapia river-based cage culture has been applied widely. However, river-based cage culture is an open culturing system where farmers do not fully control weather and water quality. This study investigates the risks of climate variability on Nile Tilapia in riv-er-based cage culture. This study recommends strategies to reduce fish yield losses. The samples of this study are the Nile Tilapia river-based cage culture farmers along the Songkhram river in 5 districts in Sakon Nakhon and Nakhon Phanom, including Thauthen, Khamtakla, Akatamnuai, Sisongkhram and Nathom. This study applies a simple random sampling method. We used structured questionnaires to collect the data from 148 fish farmers between April and December 2017. Hot weather during March and April was perceived to be the most important factor causing fish diseases and led to losses (68.2 %). The other significant factors that led to fish death were drought (52.7 %) and flood (40.5 %). Flood typically takes place between June and August. Cold weather was perceived not to affect the fish losses (32.4 %). However, it did affect the growth rate. Cold weather typically takes place between December and February. Re-garding the hot weather, fish farmers applied preventive measures such as mon-itoring and surveillance, stopping or delaying stocking schedules. For drought, the fish farmers relocated the cages towards the deeper water areas and used aerators to control water quality. Most farmers tie their cages securely during flooding season and relocate them closer to the bank. The fish farmers moni-tored their cages more closely than usual for the cold weather and postponed the stocking date. The study of risks and loss mitigation from climate variabilities in this research will be helpful for strategic aquaculture planning to cope with cli-mate variabilities in the future.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122645145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Mg Content on Synthesis of TiC Powder from Leucoxene by Self-Propagating High-Temperature Synthesis Method","authors":"T. Chanadee, S. Niyomwas, Kritsada Patcharasit, S. Singsarothai","doi":"10.55164/ajstr.v24i3.243506","DOIUrl":"https://doi.org/10.55164/ajstr.v24i3.243506","url":null,"abstract":"Titanium carbide (TiC) composite powder was synthesized via the self-propagating high-temperature synthesis (SHS) method using leucoxene as a source of titanium oxide (TiO2) and magnesium (Mg) as an initiator. The effect of Mg content on synthesized TiC composite powder was characterized in terms of chemical composition and morphology by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Results showed that adding 1.5 moles Mg into the reactant system leached with 0.1 M hydrochloric acid solution was the optimal condition, and TiC was apparent in the XRD analysis at a particle size of less than 150 μm.","PeriodicalId":426475,"journal":{"name":"ASEAN Journal of Scientific and Technological Reports","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123344745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}